showuon commented on a change in pull request #11368: URL: https://github.com/apache/kafka/pull/11368#discussion_r735113220
########## File path: streams/src/main/java/org/apache/kafka/streams/kstream/TableJoined.java ########## @@ -0,0 +1,135 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.kafka.streams.kstream; + +import org.apache.kafka.streams.processor.StreamPartitioner; + +import java.util.function.Function; + +/** + * The {@code TableJoined} class represents optional parameters that can be passed to + * {@link KTable#join(KTable, Function, ValueJoiner, TableJoined) KTable#join(KTable,Function,...)} and + * {@link KTable#leftJoin(KTable, Function, ValueJoiner, TableJoined) KTable#leftJoin(KTable,Function,...)} + * operations, for foreign key joins. + * @param <K> this key type ; key type for the left (primary) table + * @param <KO> other key type ; key type for the right (foreign key) table + */ +public class TableJoined<K, KO> implements NamedOperation<TableJoined<K, KO>> { + + protected final StreamPartitioner<K, Void> partitioner; + protected final StreamPartitioner<KO, Void> otherPartitioner; + protected final String name; + + private TableJoined(final StreamPartitioner<K, Void> partitioner, + final StreamPartitioner<KO, Void> otherPartitioner, + final String name) { + this.partitioner = partitioner; + this.otherPartitioner = otherPartitioner; + this.name = name; + } + + protected TableJoined(final TableJoined<K, KO> tableJoined) { + this(tableJoined.partitioner, tableJoined.otherPartitioner, tableJoined.name); + } + + /** + * Create an instance of {@code TableJoined} with partitioner and otherPartitioner {@link StreamPartitioner} instances. + * {@code null} values are accepted and will result in the default partitioner being used. + * + * @param partitioner a {@link StreamPartitioner} that captures the partitioning strategy for the left (primary) + * table of the foreign key join. Specifying this option does not repartition or otherwise + * affect the source table; rather, this option informs the foreign key join on how internal + * topics should be partitioned in order to be co-partitioned with the left join table. + * The partitioning strategy must depend only on the message key and not the message value, + * else the source table is not supported with foreign key joins. This option may be left + * {@code null} if the source table uses the default partitioner. + * @param otherPartitioner a {@link StreamPartitioner} that captures the partitioning strategy for the right (foreign + * key) table of the foreign key join. Specifying this option does not repartition or otherwise + * affect the source table; rather, this option informs the foreign key join on how internal + * topics should be partitioned in order to be co-partitioned with the right join table. + * The partitioning strategy must depend only on the message key and not the message value, + * else the source table is not supported with foreign key joins. This option may be left + * {@code null} if the source table uses the default partitioner. + * @param <K> this key type ; key type for the left (primary) table + * @param <KO> other key type ; key type for the right (foreign key) table + * @return new {@code TableJoined} instance with the provided partitioners + */ + public static <K, KO> TableJoined<K, KO> with(final StreamPartitioner<K, Void> partitioner, + final StreamPartitioner<KO, Void> otherPartitioner) { + return new TableJoined<>(partitioner, otherPartitioner, null); + } + + /** + * Create an instance of {@code TableJoined} with base name for all components of the join, including internal topics + * created to complete the join. + * + * @param name the name used as the base for naming components of the join including internal topics + * @param <K> this key type ; key type for the left (primary) table + * @param <KO> other key type ; key type for the right (foreign key) table + * @return new {@code TableJoined} instance configured with the name Review comment: nit: with the name -> with the `{@code name}` ########## File path: streams/src/main/java/org/apache/kafka/streams/kstream/internals/foreignkeyjoin/ForeignJoinSubscriptionProcessorSupplier.java ########## @@ -69,9 +68,6 @@ public void init(final org.apache.kafka.streams.processor.ProcessorContext conte store = internalProcessorContext.getStateStore(storeBuilder); } - /** - * @throws StreamsException if key is null - */ Review comment: Just want to confirm, this comment removal is not because of your change, right? ########## File path: streams/src/main/java/org/apache/kafka/streams/kstream/TableJoined.java ########## @@ -0,0 +1,135 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.kafka.streams.kstream; + +import org.apache.kafka.streams.processor.StreamPartitioner; + +import java.util.function.Function; + +/** + * The {@code TableJoined} class represents optional parameters that can be passed to + * {@link KTable#join(KTable, Function, ValueJoiner, TableJoined) KTable#join(KTable,Function,...)} and + * {@link KTable#leftJoin(KTable, Function, ValueJoiner, TableJoined) KTable#leftJoin(KTable,Function,...)} + * operations, for foreign key joins. + * @param <K> this key type ; key type for the left (primary) table + * @param <KO> other key type ; key type for the right (foreign key) table + */ +public class TableJoined<K, KO> implements NamedOperation<TableJoined<K, KO>> { + + protected final StreamPartitioner<K, Void> partitioner; + protected final StreamPartitioner<KO, Void> otherPartitioner; + protected final String name; + + private TableJoined(final StreamPartitioner<K, Void> partitioner, + final StreamPartitioner<KO, Void> otherPartitioner, + final String name) { + this.partitioner = partitioner; + this.otherPartitioner = otherPartitioner; + this.name = name; + } + + protected TableJoined(final TableJoined<K, KO> tableJoined) { + this(tableJoined.partitioner, tableJoined.otherPartitioner, tableJoined.name); + } + + /** + * Create an instance of {@code TableJoined} with partitioner and otherPartitioner {@link StreamPartitioner} instances. + * {@code null} values are accepted and will result in the default partitioner being used. + * + * @param partitioner a {@link StreamPartitioner} that captures the partitioning strategy for the left (primary) + * table of the foreign key join. Specifying this option does not repartition or otherwise + * affect the source table; rather, this option informs the foreign key join on how internal + * topics should be partitioned in order to be co-partitioned with the left join table. + * The partitioning strategy must depend only on the message key and not the message value, + * else the source table is not supported with foreign key joins. This option may be left + * {@code null} if the source table uses the default partitioner. + * @param otherPartitioner a {@link StreamPartitioner} that captures the partitioning strategy for the right (foreign + * key) table of the foreign key join. Specifying this option does not repartition or otherwise + * affect the source table; rather, this option informs the foreign key join on how internal + * topics should be partitioned in order to be co-partitioned with the right join table. + * The partitioning strategy must depend only on the message key and not the message value, + * else the source table is not supported with foreign key joins. This option may be left + * {@code null} if the source table uses the default partitioner. + * @param <K> this key type ; key type for the left (primary) table + * @param <KO> other key type ; key type for the right (foreign key) table + * @return new {@code TableJoined} instance with the provided partitioners + */ + public static <K, KO> TableJoined<K, KO> with(final StreamPartitioner<K, Void> partitioner, + final StreamPartitioner<KO, Void> otherPartitioner) { + return new TableJoined<>(partitioner, otherPartitioner, null); + } + + /** + * Create an instance of {@code TableJoined} with base name for all components of the join, including internal topics + * created to complete the join. + * + * @param name the name used as the base for naming components of the join including internal topics + * @param <K> this key type ; key type for the left (primary) table + * @param <KO> other key type ; key type for the right (foreign key) table + * @return new {@code TableJoined} instance configured with the name + * + */ + public static <K, KO> TableJoined<K, KO> as(final String name) { + return new TableJoined<>(null, null, name); + } + + /** + * Set the custom {@link StreamPartitioner} to be used as part of computing the join. Null values Review comment: nit: Null values -> `{@code null}` value -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
